package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 统计指定时间区域内的营业额数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistic(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin到end范围内的每天日期
        List<LocalDate> dataList = new ArrayList<>();

        dataList.add(begin);

        while(!begin.equals(end)){
            //日期计算,计算指定的后一天日期
            begin=begin.plusDays(1);
            dataList.add(begin);
        }

        //存放每天的营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate data : dataList) {
            //查询data日期对应的营业额，状态为 已完全
            LocalDateTime beginTime = LocalDateTime.of(data, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(data, LocalTime.MAX);


            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover==null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }


        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dataList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }


    /**
     * 统计用户数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistic(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin到end范围内的每天日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while(!begin.equals(end)){
            //日期计算,计算指定的后一天日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //select count(id） from user where create_time < ? and create_time > ?
        //新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        //select count(id） from user where create_time < ?
        //总用户数量
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            //将date变为localdateTime类型 可以获取到开始的时刻，和结束时刻
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("end",endTime);
            Integer totalUser = userMapper.countByMap(map);

            map.put("begin",beginTime);
            //新增用户数量
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);

        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ",")).totalUserList(StringUtils.join(totalUserList, ",")).newUserList(StringUtils.join(newUserList, ",")).build()
                ;
    }
    /**
     * 统计指定时间区间内订单数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin到end范围内的每天日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while(!begin.equals(end)){
            //日期计算,计算指定的后一天日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }


        //每天订单总数
        List<Integer> orderCountList = new ArrayList<>();
        //每天有效订单总数
        List<Integer> validorderCountList = new ArrayList<>();

        //遍历dateList集合 查询每天有效订单数和订单总数
        for (LocalDate date : dateList) {
            //select count(id) from orders where order_time > ? and order_time < ?
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //获取所有订单数
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            //有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = 5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validorderCountList.add(validOrderCount);

        }


        //计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数量
        Integer validOrderCount = validorderCountList.stream().reduce(Integer::sum).get();

        Double  orderCompletionRate = 0.0;
        if(totalOrderCount!=0) {
            //订单完成率
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validorderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }



    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
         Map map = new HashMap<>();
         map.put("begin",begin);
         map.put("end",end);
         map.put("status",status);

        return orderMapper.countByMap(map);
    }


    /**
     * 统计销量前十商品
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");


        //封装返回结果
        return  SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();

    }


    /**
     * 导出运营数据报表
     * @param httpServletResponse
     */
    @Override
    public void exportBusinessData(HttpServletResponse httpServletResponse) {
        //查询数据库 获取营业数据----查询最近三十天
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);


        BusinessDataVO data = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));


        //2.通过POI将数据导入excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");


        //基于模版文件创建一个新的excel文件
        try  {
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //填充数据--时间
            //获取sheet便签页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            //获取行
            sheet.getRow(1).getCell(1).setCellValue("时间： "+dateBegin+"至"+dateEnd);

            //获得第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(data.getTurnover());
            row.getCell(4).setCellValue(data.getOrderCompletionRate());
            row.getCell(6).setCellValue(data.getNewUsers());

            //获得第五行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(data.getValidOrderCount());
            row.getCell(4).setCellValue(data.getUnitPrice());



            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天明细数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }


            //3.通过输出流将excel文件下载到客户端浏览器
            ServletOutputStream out = httpServletResponse.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        }
        catch (IOException e){
            e.printStackTrace();
        }


    }
}
